RTX is different from OmniSTAR. OmniSTAR offers XP, G2 (=XP + GLONASS), and HP. Then there's RTX. None of the OmniSTAR corrections are repeatable, while RTX is. RTX includes GLONASS automatically for the life of the subscription, even if your receiver isn't unlocked to GLONASS.

If you need repeatability, you need RTX (or RTK). RTX is repeatable to within 1.5", RTK to within 1".